S-91223A342 5/16"-18 x 2 1/2" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to premium 316 stainless steel construction
• Exceptional strength and durability with a high 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Reliable and precise assembly ensured by the Class 2A thread fit and consistent UNC coarse threads
• Space-saving installation in confined areas enabled by the ultra-low profile socket head and compact 5/32" hex drive
• Full-length gripping power provided by the fully threaded design for maximum hold and stability
• Compliance with major environmental regulations, including RoHS 3 and REACH, for use in regulated industries
• Broad compatibility with standard 5/16"-18 UNC components, simplifying sourcing and inventory

Professional Applications & Engineering Value

Engineered for precision and endurance, this 316 stainless steel socket head cap screw addresses critical challenges in industrial settings where corrosion resistance and mechanical reliability are paramount. The ultra-low profile head and hex drive design allow for secure fastening in tight spaces, reducing assembly time and improving accessibility. With its UNC coarse threads and Class 2A fit, it ensures consistent engagement and vibration resistance, minimizing the risk of loosening in high-stress environments like machinery, automotive systems, and marine equipment. The fully threaded body and high tensile strength provide uniform clamping force, enhancing joint integrity and longevity in demanding industrial fasteners applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and UNC coarse threads (5/16"-18) for reliable performance. It meets manufacturing specifications for Rockwell B70 hardness and 70,000 psi tensile strength, ensuring durability under load. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.